JP3021193U - Bowling rod holding device - Google Patents

Abstract

(57) [Abstract] [Problem] To firmly hold the boring rod,
It is not necessary to release the hydraulic pressure and pull up the boring rod with a wire rope at the same time when pulling up the boring rod, and it is easy to operate and can be operated by unskilled personnel, improving work efficiency and safety. To provide a boring rod holding device that contributes to the improvement of A boring rod is fixedly held by a wedge piece by operating a hydraulic cylinder. Boring rod 1 even if the hydraulic pressure of hydraulic cylinder 6 is released
0 is maintained as it is due to the wedge force of the wedge piece 2 due to its own weight. Here, by connecting a wire rope or the like to the boring rod 10 and pulling up the boring rod 10, the abutting engagement between the wedge piece 2 and the boring rod 10 is released, and the boring rod 10 can be easily pulled up or lowered.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a holding device for preventing a drop of a boring rod used for boring work, and in particular, a boring capable of separately performing the operation of the holding device at the time of collecting the boring rod and the hanging operation of the boring rod. Regarding the rod holding device.

[0002]

[Prior art]

 Boring rods are used for boring operations such as geological surveys, mineral exploration, water well drilling, grout injection hole drilling, and drilling for cast-in-place piles. When collecting bits such as excavating tools or core barrels containing geological samples from the bottom of the hole to the ground, the boring rod suspended in the drilled hole should not be dropped on the bottom of the hole to prevent it from falling to the bottom of the hole. It is necessary to hold the rods, for which boring rod holders have been used for some time.

FIG. 4 shows a state in which the boring rod is recovered by using the boring rod holding device according to the present invention. Generally, the boring rod 10 includes the hydraulic chuck 22 and the hydraulic chuck 22 of the drilling machine 19. It is collected by the wire rope 23 while being inserted into the spindle 21. The drilling machine 19 includes a basic frame 1a of the drilling machine installed in contact with the ground surface 7 and a machine body 20, the spindle 21 rotatably supported by the machine body 20 via a drive mechanism, and the inside thereof. The hydraulic chuck 22 that holds the inserted boring rod 10, the wire rope 23 and the pulley 23a that engage with the boring rod 10, the turret (not shown) that supports this, and the wire rope 23 are provided. It consists of a winch 25 and the like to be wound. Further, the machine body 20 can slide on the basic frame 1a placed on the ground surface 7, and the spindle 21 can be moved right above the boring hole. Further, the machine body 20 includes a spindle 21, a hydraulic chuck 22, various operation levers such as a hydraulic switching lever 26 for operating a conventional boring rod holding device (not shown), a winch hand lever 27, etc. ) Is provided.

As a conventional boring rod holding device (not shown), a holding tool (not shown) operated by a hydraulic cylinder is generally used to hold the outer circumference of the boring rod 10. As described above, since the boring rod 10 is suspended in the hole, when the hydraulic pressure is released from the boring rod 10, the boring rod 10 falls. Therefore, it is necessary to connect the wire rope 23 to the boring rod 10 in advance to prevent it from falling. However, even if the wire rope 23 is connected, the boring rod 10 having a heavy weight falls to some extent due to the release of hydraulic pressure, and gives an impact force to the turret (not shown) and the wire rope 23. Therefore, in order to apply tension to the wire rope 23 in advance, it is necessary to operate the winch hand lever 27 to apply an upward acting force to the boring rod 10. Therefore, when recovering the boring rod 10 on the ground side, it is necessary to operate at least the hydraulic switching lever 26 and the winch hand lever 27 at the same time to prevent the boring rod 10 from dropping when the hydraulic cylinder is released. there were.

[0005]

[Problems to be solved by the device]

 As described above, the operation of operating the hydraulic switching lever 26 and the winch hand lever 27 at the same time is quite troublesome and requires a skilled operator. Further, the winding force of the wire rope 23 is determined by the pulling force of the winch hand lever 27, and this pulling force is changed by the manual operation force. Therefore, it is quite difficult to balance the hoisting force with the weight of the boring rod 10. If the hoisting force is larger than its own weight, the boring rod 10 may jump up at the moment when the hydraulic cylinder is released. If the hoisting force is smaller than its own weight, the boring rod 10 suddenly drops slightly as the hydraulic cylinder is released, and an impact force is applied to the turret and the wire rope. On the other hand, depending on the structure of the drilling machine 19, a skilled operator is required to operate the hydraulic switching lever 26 and the winch hand lever 27, so that it takes a considerable period of time for training. Further, there is a problem that the boring rod holding device and the boring rod 10 come into contact with each other and damage the device.

The present invention solves the above-mentioned problems, and ensures that the boring rod is firmly held, and that it is not necessary to operate the hydraulic switching lever and the winch hand lever at the same time, which facilitates the operation. Therefore, it is possible to operate even unskilled operators to improve the efficiency of work, and at the same time, it is possible to work safely without adding impact force or damage to the machine side or device side, and making it possible to perform work safely. The purpose is to provide.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the bowling rod holding device according to the present invention is characterized in that it is configured as follows. In other words, it is a holding device to prevent the lower boring rod suspended in the air when it is pulled up for exchanging the bit of the boring rod vertically inserted into the ground for excavation work, etc. There is a wedge piece that engages the inner surface side of the boring rod so that it can be attached to and detached from the outer circumference of the boring rod and forms an inclined surface on the outer surface side, and a receiving surface that contacts the inclined surface of the wedge piece. A fixture fixed to a base plate placed on the base, a piece pressing tool elastically supported by the receiving tool via a spring and having a lower surface abutting the upper surface of the wedge piece, and the piece pressing tool It is characterized in that a hydraulic cylinder for operating a push plate for pressing is provided. More specifically, the spring is characterized in that it is always biased so as to release the piece pressing tool.

[0008]

[Embodiment of device]

 When the winch provided in the main body of the drilling machine is actuated to raise or lower from the borehole, the screw connection part of the boring rod is stopped at a predetermined position above the boring rod holding device. When pulling up the bowling rod, in this state, the hydraulic cylinder of the bowling rod holding device is operated to press the wedge piece through the piece pressing tool, and the wedge piece contacts the receiver on its outer peripheral side. Since the contacting slanted surface is formed, a wedge force acts between the slanted surface and the receiver, and the boring rod is firmly held. In this state, turn the upper bowling rod to release the screw connection and remove the upper bowling rod. In this state, retract the machine body, attach the suspending tool and wire rope to the screw connection part of the boring rod that is stopped at the predetermined position above the boring rod holding device, and attach the boring rod with the winch. Pull up. When pulling up the bowling rod, the hydraulic cylinder of the bowling rod holding device is released. At this time, the bowling rod tries to fall due to its own weight. However, this self-weight is held by the wedge force between the wedge piece and the receiver, and the boring rod does not fall. When the wire rope connected to the boring rod is operated in this state to move the boring rod upward, the spring pushing force raises the bridge pressing tool, releasing the pressure contact engagement between the wedge bridge and the boring rod. The rod can be pulled up (see Figure 4). Pull up the boring rod, and when the next threaded joint with the boring rod reaches the upper position of the boring rod holding device, stop it again and remove the upper boring rod as described above. It is possible to screw the hanging tool to the lower bowling rod, attach a wire rope, and pull up the bowling rod one after another with a winch. On the other hand, in order to perform boring, when joining the boring rod, the spindle is moved directly above the boring rod held at a predetermined position above the boring rod holding device and the wire rope is moved. The bowling rod hung by is passed through the hydraulic chuck and the spindle, and screwed to the bowling rod held at a predetermined position above the bowling rod holding device. The boring rod is joined to the next bowling rod by a conventional hydraulic chuck for joining the boring rods.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are axial sectional views for explaining the structure of the present embodiment and its operation.

The boring rod holding device 1 includes a wedge piece 2 for abutting and holding the outer circumference of a boring rod 10 penetrating the central portion thereof, a receiving piece 3, a piece pressing piece 4 and a pressing plate 5, and a hydraulic pressure. It consists of a cylinder 6 and the like. A pair of hydraulic cylinders 6, 6 are fixed on a base plate 8 placed on the surface of the earth 7 with a boring rod 10 interposed therebetween, and the push plate 5 is installed between the piston rods 9, 9. On the other hand, the receiver 3 is fixed on the base plate 8, and a taper surface 11 is formed on the inner surface side thereof so as to reduce the diameter downward. Further, a concave hole 12 having the same inclination angle as that of the tapered surface 11 is formed in the thick portion of the receiving member 3. On the other hand, the wedge piece 2 forms an abutting surface 13 that abuts and engages with the outer circumference of the boring rod 10 on the inner surface side, and forms an inclined surface 14 on the outer surface side that abuts the tapered surface 11 of the receiving tool 3. It is made of material.

A guide rod 15 of a spring 18 is inserted into the recessed hole 12 of the receiving tool 3, and the tip end side of the guide rod 15 is fitted to the piece pressing tool 4. The piece pressing tool 4 has a substantially flat plate shape, and is arranged so as to face the pressing plate 5. Further, the piece pressing tool 4 and the wedge piece 2 are fixed by a bolt 16. Further, a spring 18 is provided between the lower surface of the piece pressing tool 4 and the hole bottom 17 of the concave hole 12 of the receiving tool 3.

FIG. 1 shows a state in which the boring rod 10 is firmly held by the wedge pieces 2 and 2. That is, when the hydraulic switching lever 26 (FIG. 4) is operated and the hydraulic cylinder 6 is operated, the push plate 5 descends via the piston rod 9 and presses the piece pressing tool 4 via the bolt 16. The piece pressing tool 4 pushes down the guide rods 15 and 15 into the recessed hole 12 against the spring force of the spring 18 and contacts the upper surface of the wedge piece 2 to press the wedge piece 2 downward. As a result, the inclined surface 14 of the wedge piece 2 comes into pressure contact with the tapered surface 11 of the receiver 3 and is pressed toward the center. As a result, the contact surface 13 of the wedge piece 2 moves to the center side and presses against the outer periphery of the bowling rod 10 to firmly hold the bowling rod 10. Since a wedge force is generated between the inclined surface 14 of the wedge piece 2 and the tapered surface 11 of the receiver 3, the bowling rod 10 is firmly gripped by the wedge piece 2.

Next, the operation of releasing the holding of the boring rod 10 to recover it will be described. First, the hydraulic pressure switching lever 26 is operated to operate the hydraulic cylinder 6, and the piston plate 9 is extended to separate the push plate 5 from the bolt 16 as shown in FIG. Therefore, the pressing of the wedge piece 2 by the piece pressing tool 4 is released. However, due to the frictional force of the contact surface 13 of the wedge piece 2 due to the weight of the bowling rod 10, the inclined surface 14 of the wedge piece 2 is pushed into the taper surface 11 of the receiving tool 3 and the pressure contact is continued. Therefore, the boring rod 10 is fixedly held by the wedge piece 2 and the like in a shape substantially similar to the fixed state shown in FIG.

Next, the wire rope 23 is connected to the boring rod 10, and the winch hand lever 27 is operated to suspend and support the boring rod 10 and move it upward. As a result, the spring force of the spring 18 overcomes the frictional force to move the piece pressing tool 4 upward, and the bolt 16 contacts the pressing plate 5 as shown in FIG. As a result, as shown in the drawing, the wedge piece 2 moves upward along the tapered surface 11 of the receiving tool 3, and the contact surface 13 thereof separates from the outer circumference of the boring rod 10. By operating the winch hand lever 27 (FIG. 4), the boring rod 10 can be moved up and down.

As described above, the boring rod holding device 1 of the present embodiment first operates only the hydraulic switching lever 26 to release the hydraulic gripping force by the hydraulic cylinder 6, and then operates the winch hand lever 27 to perform boring. Since it is sufficient to pull up the rod 10, it is safe because two operations are not performed simultaneously.

[0016]

[Effect of device]

 According to the present invention, the following remarkable effects are obtained. 1) By using a wedge piece, it is possible to securely hold the boring rod. 2) When the boring rod is lifted, even if the holding of the boring rod by the hydraulic cylinder is released, the boring rod's own weight acts on the wedge piece and the boring rod is held by the wedge force. It is not necessary to carry out the pulling up operation at the same time. Therefore, the operation work can be facilitated, and even an unskilled operator can operate, and the work efficiency can be improved. 3) When the hydraulic pressure is released, the boring rod does not bounce up or fall, so no impact force is applied to the machine body side, and no damage to each part due to contact with the boring rod. 4) The boring rod lifting operation is safely performed by unskilled operators regardless of the size of the drilling machine.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a state in which a bowling rod holding device according to an embodiment of the present invention firmly grips a bowling rod.

FIG. 2 is an explanatory view showing a boring rod holding device in the present embodiment in which the boring rod is firmly held by its own weight when hydraulic pressure is released.

FIG. 3 is an explanatory view showing a state in which the boring rod of the present embodiment is released from gripping.

FIG. 4 is a partially omitted overall view showing a schematic structure of a drilling machine to which this embodiment is applied.

[Explanation of symbols]

 1 Boring rod holding device 1a Basic frame of drilling machine 2 Wedge piece 3 Receiving tool 4 Piece pressing tool 5 Push plate 6 Hydraulic cylinder 7 Ground surface 8 Base plate 9 Piston rod 10 Boring rod 11 Tapered surface 12 Recessed hole 13 Contact surface 14 inclined surface 15 guide rod 16 bolt 17 hole bottom 18 spring 19 drilling machine 20 machine body 21 spindle 22 hydraulic chuck 23 wire rope 23a pulley 24 lifting device 25 winch 26 hydraulic switching lever 27 hand lever for winch

Claims (2)

[Scope of utility model registration request] 1. A holding device for preventing a bowling rod vertically inserted into the ground for excavation work or the like from falling, the inner surface side of which is detachably attached to the outer periphery of the boring rod. And a wedge piece that forms an inclined surface on the outer surface side, a receiving member that has a receiving surface that contacts the inclined surface of the wedge piece, and that is fixed to a base plate that is placed on the ground surface,
A piece pressing tool elastically supported by the receiving tool via a spring and having a lower surface abutting the upper surface of the wedge piece, and a hydraulic cylinder for operating a pressing plate for pressing the piece pressing tool are provided. A boring rod holding device. 2. The boring rod holding device according to claim 1, wherein the spring is constantly biased so as to release the piece pressing tool.